Hi, I use PPPoE client to connect to PPPoE server (BRAS) via 1GE link. When I use build-in PPPoE client (standard Windows client) I have max 50Mbps speed. Why ? I have also tested PPPoE using WinPoet client under XP and I have achieved 300Mbps. On Linux I have 930Mbps. My laptop has 1GE network interface card and I test bandwidth using iperf application (http://www.noc.ucf.edu/Tools/Iperf/). I have also increased TcpWindowSize according to http://msdn2.microsoft.com/en-us/library/aa561380.aspx but without success :( Regards, Marcin.